Fiqh-us-Sunnah Volume 5, Hajj and ‘Umrah, Fiqh 5.003A.

Abu Hurairah says the Prophet (peace be upon him) said: “All sins committed in between the performance of one ‘Umrah and another are expiated and erased, and the reward of Hajj Mabrur is nothing save Paradise.” (Bukhari and Muslim)

In another sound hadith Ibn Joraij relates from Jabir that the Prophet (peace be upon him) said: “This House of Allah (the Ka’bah) is the pillar of Islam, so whosoever heads to it with the intention of performing Hajj or ‘Umrah is under Allah’s security. If he should die (during his trip) he is granted Paradise, and if he returns home safely, he returns with reward and gain.”